CODEWITHSUNDEEP
python
xmen
xmen

Reputation: 9

issue with LRU cache of cachetools

i am using LRUCache from cachetools library, but when i am trying to append i am getting the error 'dict' object has no attribute 'append' though i understand what is the error, i cant seem to figure out any way to get around it, can someone help? here is a little code.

GivenQuestionsCache=LRUCache(maxsize=100,missing=getGivenQuestions)
now GivenQuestionsCache[1] gives
{1: [[211736, None], [211736, 'a'], [207113, 'a'], [219556, None], [207095, None], [89027, None], [89027, None]]}

and i am trying to do 

GivenQuestionsCache[1].append([10,None])

then it throws that error. is there any other way to achieve this? i want my cache to become 

{1: [[211736, None], [211736, 'a'], [207113, 'a'], [219556, None], [207095, None], [89027, None], [89027, None],[10,None]]}

Upvotes: 0

Views: 1086

Answers (1)

Alex Pertsev
Alex Pertsev

Reputation: 948

I tested your code and it works:

from cachetools import LRUCache
GivenQuestionsCache=LRUCache(maxsize=100,missing=lambda _: dict())
GivenQuestionsCache[1] = [[211736, None], [211736, 'a'], [207113, 'a'], [219556, None], [207095, None], [89027, None], [89027, None]]
GivenQuestionsCache[1].append([10,None])
print GivenQuestionsCache[1]

returns

[[211736, None],
 [211736, 'a'],
 [207113, 'a'],
 [219556, None],
 [207095, None],
 [89027, None],
 [89027, None],
 [10, None]]

But

GivenQuestionsCache[2].append([10,None])

will return

AttributeError: 'dict' object has no attribute 'append'

So you need to check all your code that potentially can modify GivenQuestionsCache.

Upvotes: 1

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